/Engine/Source/Runtime/Landscape/Classes/Landscape.h
void ClearLayer ( int32 InLayerIndex, [TSet](API\Runtime\Core\Containers\TSet)< [TObjectPtr](API\Runtime\Core\Delegates\TObjectPtr)< [ULandscapeComponent](API\Runtime\Landscape\ULandscapeComponent) >> * InComponents, ELandscapeClearMode InClearMode )